Find an ancient romance novel. The hero and heroine are husband and wife. The hero is tall and simple, and the heroine is petite and smart. They have a daughter.

Is it "My Love Kaifeng"? The content of the novel is very similar to what you described. The heroine Shi Ji married the hero. The hero is very simple and honest. The heroine has two younger brothers, a little black and a little smart. She has a daughter named Qingwa.

The fortune teller said that his fate was evil and doomed to be lonely, and her appearance was a miracle, which turned his lovely life around. Even though he knew that she was going to commit herself to marriage for Gu Quanqing, he would rather ignore the differences with her, but the gossiping bitch pointed out that they were flowers and cow dung and accidentally learned that she had a famous fiance. The news completely punctured his self-deception for many years. Since he is not the good husband she expected to accompany her for life, it should not be his, and she can only be returned to the person who should marry ... When I first met him, I was deeply attracted by his simplicity and shyness. I thought I met a good husband who was rare in a hundred years. I tried my best to keep him so that I could get close to him. Finally, I sacrificed my reputation just to force him to marry her, and thus implicated hundreds of people as ghosts of his sword. But his ridiculous inferiority complex made her stubbornly believe that no matter what she did, she was forced to marry him, even if he turned a blind eye and even used an irrelevant third party to test her love.